KarabinerでやっていたことをHammerspoonで代替する(USキーボード用)

init.lua

local VK_SEMICOLON = 0x29
local VK_ESC = 0x35
local VK_RIGHT_BRACKET = 0x21
local VK_J = 0x26

-- Auto reload config
function reloadConfig(files)
    doReload = false
    for _,file in pairs(files) do
        if file:sub(-4) == ".lua" then
            doReload = true
        end
    end
    if doReload then
        hs.reload()
    end
end

local myWatcher = hs.pathwatcher.new(os.getenv("HOME") .. "/.hammerspoon/", reloadConfig):start()
hs.alert.show("Config loaded")

-- Key remapping
local function switchToJp()
    hs.eventtap.keyStroke({'ctrl'}, '0')
end

local function switchToUs()
    hs.eventtap.keyStroke({}, 'l')
end

function flagsMatches(flags, modifiers)
    local set = {}
    for _, i in ipairs(modifiers) do set[string.lower(i)] = true end
    for _, j in ipairs({'fn', 'cmd', 'ctrl', 'alt', 'shift'}) do
        if set[j] ~= flags[j] then return false end
    end
    return true
end

keyEventtap = hs.eventtap.new({
    hs.eventtap.event.types.keyDown
}, function(event)
    local bundleId = string.lower(hs.application.frontmostApplication():bundleID())
    local keyCode = event:getKeyCode()
    local flags = event:getFlags()
    -- hs.console.printStyledtext(keyCode)

    -- Swap : and ;
    if keyCode == VK_SEMICOLON then
        if flagsMatches(flags, {'shift'}) then
            event:setKeyCode(VK_SEMICOLON)
            event:setFlags({})
        else
            event:setKeyCode(VK_SEMICOLON)
            event:setFlags({shift=true})
        end
    end

    --  For vim with AquaSKK on iterm2
    if bundleId == 'com.googlecode.iterm2' then
        if keyCode == VK_J and flagsMatches(flags, {'ctrl'}) then
            switchToJp()
            event:setKeyCode('')
            event:setFlags({})
        end

        if keyCode == VK_RIGHT_BRACKET and flagsMatches(flags, {'ctrl'}) then
            switchToUs()
        end

        if keyCode == VK_ESC then
            switchToUs()
        end
    end
end)
keyEventtap:start()

iterm2でC-Jが改行になってしまう問題はどうしようもないので、とりあえず、AquaSKKの日本語ONをC-0にすることで回避